Improvement in bed-bottoms



D. H. MATHIAS 8L C. VAN DERZEE.V

, Bed-Bottoms.

N0'.147,778, Patented Feb.24.1874.

UNITED STATES PATENT OFFICEo y DAVID H. MATHIAS AND CORNELIUS VAN DERZEE, OF ALBANY, NEV YORK,

ASSIGNORS OF ONE-THIRD THEIR RIGHT TO DAVID DOREMUS, OF SAME PLAGE.

IMPROVEMENT IN 'BED-BOTTOMS.

Specification forming part of Letters Patent No. 147,778, dated February 24, 1874; application lled May 16, 1873.

To all whom it may concern.:

Be it known that we, DAVID H. Marr-iras and GoRNELIUs VAN DEEZEE, both of the city and county of Albany and State of New York, have invented a new and useful Im provement in Bed-Bottoms; and Awe hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing making a part of this specication, in which- Figure l is a view in perspective, Fig. 2 is a side elevation, Fig. 3 is a transverse sectional view, and Fig. t is a sectional plan view, of our invention.

It has been customary to construct bed-bot toms of flexible slatsV secured to and held together by flexible straps, and supported 'by helical springs in such a manner as to give a vertically-oscillating movement to the rloor composed of the said slats. lhey have also been constructed by placing fixed standards at the hea-d and foot of the bed, and stretching the flexible straps over these, the helical springs intervening and supporting the slats, as before. This construction also gives the vertical]y-oscillating movement to the slatted iioor. In another construction, spring-bars consisting of two leaves or bars, united by adj ustable loops for regulating thel tension of the bars, have been used to support the slatted lloor, permitting only a vertical movement. In the latter instance there is no oscillating movement of the slatted licor. In the two former instances the central depression ofthe slatted door is far greater than at its edges, thereby making it extremely diflicult for two persons, or even one, to rest easily thereon. To remedy these defects, and to cause the central depression or sagging to be no greater in the center of the floor than at the edges thereof', is the object of our invention; and "to this end it consists of a spring-bar provided at each end with a rigid standard, over which is stretched a flexible strap, to which the slats are secured, supported between the standards by a series of helical springs interposed between the springbar and the flexible strap, so combined with two long or rigid bars having end bearings upon side rails or the rails of the bed that the spring-bar will be supported between the two rigid bars at the longitudinal -stantially as and for the center of the three, the object being to distribute the pressure between the spring-bar and the series of helical springs, thereby permitting the slatted floor to adapt itself to the conformation of the body, and also preventing a greater depression at its center tha-n at its edges.

In the accompanying drawing, A A represent the side rails of the frame or the side rails of the bed. B B are the rigid bars used in pairs at each -end of the frame. A spring-bar, O, provided with rigid standards E, is placed between the rigid bars B B', and secured there to at the longitudinal center a of the three, thus giving the ends ot the spring-bar C, and consequently the standards E E, vertical play. The iiexible strap c is stretched over the standards E E', which are notched in their top to retain it, and secured to the under side ofthe ends of the spring-bar O. The bases of the helical springs D rest upon and are secured to the rigid bars B B. The tops of the helical springs D are secured to and support the ilexible strap c. The slats F F are placed upon and secured to the flexible strap c. rIhe dotted line c shows the vertical play of the slatted iloor. It has no lateral play. The dotted line a shows the play of the spring-bar O.

The Letters Patent to Osker F. A. Faulkner for a bed-bottom, No. 129,218, shows a springbar, the tension of Vwhich is regulated by adjustable loops, and the slatted floor is connected thereto bystandards sitting loosely in the ends of the spring-bar. Ve` make no claim to the invention set forth in said Letters Patent No. 129,218.

What we claim, and desire to secure by Letters Patent, is

Thespring-bar G, provided with the standards E E, over which is stretched the lexible strap c', in combination with the rigid bars B B', having end bearings A A, helical springs D, and slats F, constructed and operating subpurposes hereinbefore set forth. r

DAVID H. MATHIAS. CORNELIUS VAN DERZEE.

- IVitnesses:

GEO. A. THOMPSON, Giras. J. SELKIRK. 

